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Simultaneous measurement of the ratio R = B(t -> Wb)/B(t -> Wq) and the top-quark pair production cross section with the D0 detector at root s=1.96 TeV
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2008 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 100, no 19, 192003-1-192003-7 p.Article in journal (Refereed) Published
Abstract [en]

We present the first simultaneous measurement of the ratio of branching fractions, R = B(t --> Wb)/B(t --> Wq), with q being a d, s, or b quark, and the top-quark pair production cross section sigma(t (t) over bar) in the lepton plus jets channel using 0.9 fb(-1) of p (p) over bar collision data at root s = 1.96 TeV collected with the D0 detector. We extract R and sigma(t (t) over bar) by analyzing samples of events with 0, 1, and >= 2 identified b jets. We measure R = 0.97(-0.08)(+0.09) (stat + syst) and sigma(t (t) over bar) = 8.18(-0.84)(+0.90) (stat + syst) +/- 0.50(lumi) pb, in agreement with the standard model prediction.

Place, publisher, year, edition, pages
2008. Vol. 100, no 19, 192003-1-192003-7 p.
Keyword [en]
Mathematical models, Particle detectors, Plasma jets, Problem solving, Sampling, Branching fractions, Lepton plus jets, Quarks
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-33149DOI: 10.1103/PhysRevLett.100.192003ISI: 000255962500015ScopusID: 2-s2.0-43749097413OAI: diva2:413618
QC 20110429Available from: 2011-04-29 Created: 2011-04-29Bibliographically approved

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Gollub, NilsHansson, PerStrandberg, Jonas
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